3 large eggs |
1/3 cup firmly packed brown sugar |
1 cup maple syrup |
1 teaspoon grated lemon rind |
1 teaspoon fresh lemon juice |
1/2 teaspoon vanilla extract |
1/8 teaspoon salt |
3 tablespoons butter, softened |
1 cup black walnut pieces |
1 (9-inch) unbaked pastry shell |